A metal cylinder weighing 250 g heated up from 25 to 225 ° C when 46 kJ of heat
| September 17, 2021 | education
A metal cylinder weighing 250 g heated up from 25 to 225 ° C when 46 kJ of heat was transferred to it. What metal is the cylinder made of?
Problem data: m (mass of a metal cylinder) = 250 g (0.25 kg); t1 (cylinder temperature before heating) = 25 ºС; t2 (final temperature) = 225 ºС; Q (the amount of heat that was reported to the cylinder) = 46 kJ (46 * 103 J).
The metal from which the cylinder was made is determined by the value of its specific heat capacity: Q = C * m * (t2 – t1), whence C = Q / (m * (t2 – t1)).
Calculation: C = 46 * 103 / (0.25 * (225 – 25)) = 920 J / (kg * ºС).
Answer: The cylinder is made of aluminum.
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